Parking system



July 3, 1951 w. c. BRINTON 2,558,927

PARKING SYSTEM Filed July 29, 1946 4 Sheets-Sheet 1 EI fiW STOIRE j 1 4%1LT '///j 4 3 h J4 3 I 3 J @Wfifor yQ/k (G y 1951 w. c. BRINTON2,558,927

PARKING SYSTEM Filed y 29, 1 46 v i 4 Sheets-Sheet. 2

JKUGZZZOF I 30 Zflz'ZZard C157??? {07? July 3, 1951 Filed July 29, 1946w. c. BRINTON 2,558,927

I/O VOLT I 71 2167? for W. C. BRINTON July 3, 1951 PARKING SYSTEM 4Sheets-Sheet 4 Filed July 29, 1946 C L N 7734 L 5 7/4 T/O/V rnema July3, 1951 UNITED STATES PAT ENT OFFICE assess: 1 was: $31 .32., N. Y.

Application July 29, 1948, Serial Ni). 687,031 6 Clalms. (Cl. 177-311)This invention relates to a parking system and has for one object toprovide a parking system involving a number of garages and means forindicating at several points the availability of parking space.

Another object is to provide in connection with a plurality of garagesmeans for indicating at a distance whether or not a garage has parkinspace available in it.

Another object is to provide an indicating system or board which may beinstalled at one or several places so that the condition of the garagesthroughout a city or an area may be readily ascertained.

Another object is to provide mechanism for accomplishing the resultsabove indicated.

Other objects will appear from time to time throughout the specificationand claims.

This invention is illustrated more or less diagrammatically in theaccompanying drawings, wherein:

Figure 1 is a plan view of a portion of a city block or comparable area,showing garages;

Figure 2 is a plan view of a city area including several blocks;

Figure 3 is a front elevation of one form of light of light or beacon;

Figure 6 is a schematic diagram illustrating the lighting system forseveral garages and for one central indicating board or station;

Figure 7 is a schematic diagram for automatically operating the lightsof a garage in response to movement of vehicles into and from it.

Like parts are indicated by like characters throughout the specificationand the drawings.

City blocks are designated by the numeral I throughout. As shown inFigure 1 each block is provided with sidewalks 2. 3 are intersectinstreets. The showing of the sidewalks is omitted from Figure 2.

- Garages or garage areas are distributed throughout the city and theyare indicated by the numeral 4.

In general the problem of indicating the location of a garage and thedegree of occupancy is the same whether the'garag'e be an open parkinglot or a closed garage building of any sort.

Throughout a city area it is'convenient to provide central sources ofinformation about the garage conditions. Thus a store 5 or a policestation 6 might be provided with an indicating board upon whichinformation as to the degree of occupancy of various garages or parkingareas would be automatically available. Preferably the telephone wiresalready available in the city would be used as a part of the system anda telephone exchange is indicated at I in Figure 2.

Each garage or parking area is provided with lights which are visible upand down the street on which it is located. These lights may be of manydifferent sorts. As shown in Figure 1 each of the garages 4 has a lightstandard or support 8 upon which lights 9 and II are positioned. In

the case of the corner garage shown at the upper left corner of theblock in Figure 1, lights are provided on each street to which thegarage has access. By the use of two lights, oppositely directed, it ispossible to tellthe condition of occupancy of the garage in eitherdirection up and down the street.

. In addition to the lights on the individual garages or parking areas,lights are arranged at the corners of the blocks in which the garagesappear, so that a motorist passing the street can tell whether or notthere are garages in a given block or area and can also tell thecondition of occupancy of such garages. Thus at one corner of the blockI in Figure 1 a standard Ii supports lights I! and IS. A motoristpassing this street can look along it. and will see from eitherdirection one of the lights. That, because of a distinctive color orform as will be described below, will determine whether or not garagesare in the adjacent block and will indicate whether a right or left turnis necessary to reach them.

A similar light arrangement is carried on the opposite corner of theblock by a support l4, which displays lights I5 and ii. If, for example.the lights 9 and [0 carried by the two adjacent garages are out, becausethe garages are full, and if one of the other garages is not full, thelights 15 and it will give information to that effect and will direct amotorist to the garages which are not full.

Another light assembly is carried on a support I! and carries anddisplays lights i8 and I9. At the opposite corner from that upon whichthe lights II and I! are located is a standard 20 carrying lights 2| and22. From the description and from the drawings it will be clear thateach garage or parking area is provided with light means which indicatethe location of the garage and also indicate its condition of occupancy.In addition to that each block or corresponding area is provided withadditional indicating means. By these means a visual in- 3 dication isgiven of the location of the parking facilities in the block or generalarea and also the degree of occupancy of these facilities is indicated.

One suitable form of light means is indicated in Figures 3, 4 and 5. Asshown, these are primarily indicating means and may be embodied in manydifferent arrangements and supports. A conventional reflector 23 carriesa light base 24 and a light source 23. A closing frame 23 may be of anydesired form and carries a transparent member. As shown in'Figures 3 and4, this is the member 2'! and it is provided with a design 23. Thisdesign is of a color different from the main area 21. The design is onewhich indicates that a garage is in the immediate neighborhood. It istherefore suitable for. use on individual garages or parking areas andis also suitable for use on the corner indicators which merely'show thata garage is nearby.

The design 23 is provided with an elongated portion 23 which indicatesthe direction in which the garage is to be found.

The transparent cover member of Figure is generally the same as that ofFigure 3 and corresponding parts are designated by the same numerals.The design is varied by adding the radial projecting members 33 to therounded portion 23. This is done to indicate the presence of facilitiessuch as gasoline supplies and any other supplies. By means of these andother distinctive designs on the cover members of the light devices, amotorist or anyone else passing can tell not only the location of agarage but can tell what types of facilities are available.

The arrangement shown in Figures 1, 3, 4 and 5 may be actuated manuallyor automatically and is not limited to any particular electrical circuitor mechanism. Each light on each garage is preferably provided with acover member, such as the members 21 of Figures 3 and 5, and when theyare illuminated they show the location of a particular garage and itstype. They are illuminated only when the garage has parking spaceavailable.

The corner lights, whether positioned merely at the corner of a block,such as the lights l2. l3, 2| and 22 or positioned on a garage such asthe lights l5, I3, I 3, I3, serve an additional purpose. They willusually be connected to the garages in the block and if any garage hasparking space available, the corner lights will be lighted. When all ofthe garages are full, the corner lights will be extinguished.

The system, therefore, whether operated mechanically or automatically,provides means for indicating to a passing motorist the location ofgarages in a general area, the location of particular garages and theavailability of parkin space in one or more garages.

The schematic diagram of Figure 6 shows the electric wiring for a systemwhich may be used in connection with the garage layout of Figure 1 andincludes a central indicating system which, for example, may be at thestore 3, the police station 3 or the telephone exchange I of Figure 2.

The light assembly including the lights l3 and i5 is designatedgenerallywith the numeral X It is a corner light assemblyand. its purpose is toshow the conditions in a plurality of adjacent garages, Similarly, thelight assembly, including the lights l2 and I3, is designated with thenumeral X as a whole. It is also a corner light 4 li hts l3 and I3 isdesignated at Y and the assembly including the lights 2| and 22 isdesignated as Y'. These designations occur on Figuresland 3.

Each side of each block is therefore provided with means for showingwhether or not there are garages in that block and what is theircondition.

In the schematic diagram of Figure 6 manual switches are shown, onebeing positioned at each arage. Obviously automatic devices might beshown or used instead of the manual switches. As shown, there is amanual switch 3| for the uppermost garage-4, a manual switch 32 for thelowermost garage 4, a manual switch 33 for the central upper garage 4and a manual switch 34 for the upper right hand garage 4. 33 is atransformer. 33 is a resistance. 31 is a milliammeter.

The garage lights are preferably in connection with a city circuit orother suitable source of electrical power. A conductor 33 is connectedby means of a conductor 33 to the light source l3 and by means of aconductor 43 to the light source I3. A conductor 4| is connected to theconductor 33 and to one pole of each ofthe switches 3|, 32. A conductor42 is connected to one pole of each of the switches 3| and 32 and to themain source of power.

The lights 2| and 22 are connected in parallel across the conductors 33and 4|. Each pair of lights 3 and. I3 is connected to the conductor 33and to one pole oi the switches 3| and 32, respectively. The switches 3|and 32 are connected to the conductor 42. when closed they energize thelight sources 3 and II, as well as the light sources l3. l3. 2| and 22.Each switch in each garage controls the lights 3 and III of that garageindependently from the corresponding lights 9 and i3 of another garageand each switch in each garage also controls the lights of two cornerlight assemblies: For example, the switch in the lower left-hand garage4 controls the lights 3 and In in front of it and controls the lights inthe light assemblies Y and Y.

A conductor 43 is connected to the conductor 33 and to one pole of theswitch 33 in the upper garage. Lights l2. l3. II and I3 are connected inparallel across this circuit. These are the corner light assembliesdesignated as X and X.

A conductor 44 is connected to the conductor 42 and to one pole of eachof the switches 33 and 34. Each switch 33 and 34 when closed energizesthe lights 3 and N of its particular garage and also energizes thelights |2, |3, i3 and I3.

Each of the switches 3|, 32, 33 and 34 is con nected to a relay foractuating a system at a distance. This is the system indicated in theupper right-hand corner of Figure 6. Thus the switch 3| is connected tothe magnet 43, the switch 32 is connected to the magnet 43, the switch33 to the magnet 41 and the switch 34 to the magnet 43. Each of themagnets is connected to one side of the transformer "by the conductorsshown. The same side of the transformer 33 is connected to the swtiches3|. 32.33 and 34. The opposite side of the transformer .33 is connectedthrough the conductor 43 to the conductor 42 and through the conductor33 to the conductor 33. Y

The resistance 33 is connected through a-line or conductor 3| to asource of power. The opposite side of the resistance 33 is connectedthrough a conductor 32 to the milliammeter 31 which is connected by aconductor 33 to the source of assembly. Similarly, the assemblyincluding the current.

Each magnet II, It." and ll forms a part of a relay which includes twoswitches. In each relay one switch arm A short-circuits a portion of theresistance 38 and an arm B illuminates a light source I4, 85, 86 or 51.

I have stated above that each relay is connected to one of the mainswitches 8|, 82, II and It When any of these switches is closed, itactuatcs the magnet of its relay to close the two switch arms A and B,thus lighting its respective light source and short-circuiting a portionof the resistance 86. When any light source is illuminated at thecentral station, it is an indication that the garage with which thatlight source is connected has space available. When any relay isactuated, in addition to energizing its light source, its switch arm Ais also actuated and a portion of the resistance 38 is'shorted out, thuschanging theindication on the milliammeter.

As shown the switches at the garages are intended to be closed so longas any space is available at the garage, and thus if all switches 3| to94, inclusive, were closed, each light source 84 to 51, inclusive, willbe energized and each switch arm A will be closed, thus shorting out theentire resistance 36.

It is recognized that garages may be of different sizes and the portionof the resistance which is shorted out when the switch at each garage isclosed is in proportion to the capacity of the garage. When all of thegarage switches are closed, 'the indication at the central station isthat a substantial amount of garage space is available. As each garageis filled, the operator at it opens its switch, thus extinguishing itslight at the central station and bringing into circuit its proportionalpart of the resistance. The reading of the milliammeter, therefore,gives an indication of the proportion of garages in which parking spaceis available and the individual light sources for each garage at thecentral station indicate which particular garage has space available.

Although only four garages are shown in the system in Figure 6, it is tobe understood that a large number of garages may be connected to asingle central station. Ten garages are shown in Figure 2. They wouldall normally be connected to a single central station indicator. Theproportional indication on the milliammeter will be more accurate wherea substantial number of garages is in the system and connected to thecentral station indicator.

Where a more accurate indication of the exact space available in anygarage is required, the system indicated in Figure '7 will give thatinformation. As shown in the diagram only a single garage is connectedto an indicator, but many such indicators could be installed at a singlestation and would give a specific and exact indication of the parkingspace available in each garage which is connected to the system.

The structure includes a garage 58, indicated diagrammatically in dottedlines. Entrance gates or doors 59 are provided and in the path of theentering car a switch operating mechanism 60 is installed. Exit gates 6|have associated with them switch operating means 62 over which a carleaving the garage must pass. Preferably the members 50 and 82 are longenough to hold one side of the entire car, and they cannot be operatedby a single wheel or by a pedestrian.

Indicated also diagrammatically with parts broken away in Figure 7 isthe indicating assembly at the garage. This includes a shaft 88 uponwhich a ratchet wheel 84 is fixed. A second ratchet wheel 88 is looselymounted on the shaft 83 and is connected to the wheel 84 by a spring 88.One end of the spring is fastened to the member 84 and the other to apin 61 which passes through a slot 88 in the member 84. Thus slightrelative movement of the two ratchet wheels is possible. This may becomenecessary when a car leaves at exactly the moment at which another carenters. 88 is a calibrated or otherwise marked scale which moves withthe shaft 63 and which may have a pointer 10 associated with it. It ispreferably numbered to indicate the number of cars in the garage. Meansare provided which will be described below for operating the indicatingmeans.

In general when a car enters the indicator isadvanced by one movementand when a. car leaves it is returned by one movement, so that theindicator is progressively advanced and returnedautomatically by theentrance and exit of cars to and from the garage or the parking area.

The means for advancing the indicator as a car enters include a lever'Il provided with a pawl 12 adapted to engage the notches in the ratchet64. A spring 13 normally holds it in the inoperative position. Anelectromagnet 14 is adapted to move it in the opposite direction tocause it to advance the ratchet wheel 64 by one step, which correspondsto the entrance of one car.

The means for returning the indicator include a lever 'i'l carrying apawl 19. A spring 19 normally holds it in the inoperative position. Anelectromagnet is adapted, when energized, to move the indicator byreturning the ratchet wheel one step in the opposite direction, whichcorresponds to the departure of one car.

Fixed in relation to the shaft 63 is a cam 8|. It is so positioned thatwhen the garage is full. it contacts a switch arm on a switch operatingmeans 82 to control the lights.

The indicating means at the central station is preferably identical withthe indicating means at the garage just described above and identicalnumerals have been applied to corresponding parts.

A cam 83 is positioned in relation to the shaft 63 of the centralstation indicator and closes the switch 84 which controls the light atthe central station.

' The garage lights shown in Figure '7 may be assumed to be the same asthe lights for any garage illustrated in Figure 6 and thus two pairs ofcorner lights 12 and I3 and I5 and it appear. A pair of lights 9 and I0is shown as in front of the garage. The switch which is operated by themember 82 in Figure 7 has the same purpose as any of the switches 3| to34, inclusive, of Figure 6namely, to turn off or on the street lightswhich indicate the availability of parkingspace and the corner lights.Since only a single garage indicator is shown in Figure 7, the circuitis such that when the lights 9 and III are turned out, the corner lightsare also turned out. If several garages were associated in the generalmanner shown in Figure 6, the circuit would be such that the cornerlights would only be turned out when all of the individual garage lightsare turned out, and that connection in that case would be identical withthe connection shown between the garage lights, the corner lights andthe garage switches in Figure 6.

- asaaeav 99 is the line connected with the source of power from whichthe lights I2, I9, I9 and I9 are connected inparallel to the line "whichleads to the fixed switch contact 91. The other p wer line 99 leads tothe movable switch memhere 92 and 99. The lights 9 and I9 are con-' Igarage. as well as its capacity, will usually be indicated.

The light is actuated through current from the central source by meansof a conductor 94 which is connected to the conductor 95 and theconductor 99 which is joined to the switch 94. A

conductor 99 leads from the switch 84 to the light source 92. The magnet14 at-the garage is connected in parallel with the magnet 14 at thestation. correspondingly, the magnet 99 at the garage is connected inparallel with the magnet 99 at the station. Current is furnished to thefour magnets from the main power line through a transformer 91. Thesecondary side of the transformer is connected by the conductor 99 tothe switch 99 at the garage and to the switch I99, also at the garage.

A conductor I9I connects the garage magnet I4 to the central stationmagnet I4 and a conductor I92 connects the garage magnet 99 to thecentral station magnet 99. The other sides of the garage magnets 14 and99 are joined by a conductor I99 and the corresponding sides of thecentral station magnets 14 and 99 are joined by a conductor I94. Theconductors I93 and I94 are joined and connected to the secondary side ofthe transformer 91. The conductor III is connected to the flxed contactof the switch I99 and the conductor I92- is connected to the movablecontact of the switch 99.

Although the form of the light or signal shown in Figures 3, 4 andappears in those figures with a bulb 25 and a colored transparent memberbe furnished by the bulb itself, and there is now available'a gas fllledbulb which produces on illumination a chemically blue light. Such a bulbmight be used and in that case the member 21 need not be colored.Obviously other gas filled bulbs are available producing colors otherthan blue, and any suitable color producing bulb might be used.

The insignia or device 19, as shown in Figure 3, and the device 29 withthe additions 99, as shown inFigure 5, may be made on the transparentmember 21, or they may be made by means of a lens, colored or not. Ingeneral it is to be understood that this invention is not limited to anyparticular type of insignia or design, nor to the use of colon-nor tothe use of any particular-color where color is used. The purpose ofilluminating devices visible on the street is to indicate the locationand direction and type of'facilityavailable. Where an insignia such asthe member 29, 29 is used,pthe portion 29 will type of facilitiesavailable is thus more than a mere directional device. The centralindicating board ofFigure .6 includes a plurality of lights-"forexample, the lights 94, 99, 99 and S'I-and these may be of diflerenttypes to indicate large or small garages, or they may be of diflerentcolors, or they might be associated with size indicating devices whichwould indicate size, by color or otherwise. One suitable means forindicating size is by theuse of lucite" rods. This material is availablegenerally on the market and has the property of lighting up ortransmitting light throughout its length. Thus a Lucite rod might beassociated with each of the lights 94, 55, 59 and 51 and the length ofthe rod might be in scale toindicate the size or parking capacity of thegarage.

Where a plurality of garages is indicated at a central station, asshown'in Figure 6, the central station indicator might be associatedwith a map.

In general all of the lights of the system, and particularly thosevisible from the street, may be caused to flash in any way. It is ofcourse well-known that flashing lights call attention to themselvesgenerally better than do lights which do not flash or fluctuate. Thusthe lights 25 in particular, or their equivalent members, would probablybe caused to flash and would be provided with controls either to changetheir timing or to cause them to burn steadily when the garage is almostfull. It will be preferable, where two speeds of flashing are provided,to have the more rapid flash condition at a time when the garage isfairly empty. The flash controlling means would probably be operatedmanually, although it need not be. Where flashing is provided, it mightbe either in the lights visible from the street or in the lights at acentral switchboard, or both, and the lights 54, 55, 59 and 51 may bemade to flash and their speed of flash would indicate to the observer atthe central station whether or not they were largely empty orpractically full. Where the Lucite rods or members-mentioned above areapplied at the central station, the flashing would be particularlyefiective.

The central station mechanism illustrated in Figure 7 amounts, ofcourse, to a counting device, and the dial 69 indicates the degreeofoccupancy atany moment. Obviously a curved plotting or recording devicemight be associated with the dial 99 at the central station or with thedial 69 at the garage, and would give a permanent picture or record ofthe degree of occupancy of the garage throughout the time for which therecord is made. A device of this sort is shown in my copendingapplication Serial No.'672,127, filed May 24, 1946, now abandoned, andfor that reason none is illustrated herewith.

Figure '1 shows diagrammatically only a single counter at the centralstation. Obviously any number of similar or equivalent counters might beassembled at a central station and a curve plotting device or recordingdevice could be used with each. Similarly, if a plurality of curveplotting or recording devices is used at a station, an over-alltotalizing recorder may be used.

Figure 6 comprises a schematic diagram showing the indicating andcommunicating system for a central station and a plurality of garages.It is to be understood that where the garages are sumciently numerous tojustify it, a main central station might be used which would be incommunication with all of the garages in a large area and thatsub-central stations might be interposed ahead of the main centralstation, such sub-central stations being connected with all of thegarages in an area smaller than the total area considered.

Figure 6, however, since it illustrates generally the combination of acentral station with a plurality or garages, is to be taken asillustrative broadly 01' any combination of one or more central stationswith a plurality of garages.

I claim:

1. A signal system for use with a group of garages for directing cars tosaid garages and indicating the availability of parking space therein,each of said garages having an entrance on a street, said systemincluding a signal light located at the entrance to each garage so as toindicate the position thereof, each of said signal lights being of suchcharacter that it may be seen from the street at a greater distance fromthe entrance than that at which the condition of the garage for thereception of cars can be directly observed, a signal light located at adistance from the entrances to at least some of said garages and visiblealong a street dilferent from the street on which the entrance to atleast one of said garages is located, electrical connections from eachgarage to the signal light associated with the entrance to such garage,electrical connections from each garage to the distant signal light, andcontrol means at each garage for changing the condition of the signallight at such garage and for changing the condition of the electricalconnections between such control means and the distant signal light inaccordance with the availability of parking space in such garage,whereby the distant signal light may be set from any garage to indicateavailability of parking space in at least one member of the group ofgarages when there is such space available and will be set to indicatethe absence of availability of parking space anywhere within the groupof garages only if the control means at each of the garages of the groupare all set to indicate absence of parking space in the responsiveunits.

2. A signal system for use with a group of garages for directing cars tosaid garages and indicating the availability of parking space therein,said system including a central control station for indicatingconditions at said garages, each of said garages having an entrance onthe street, said system including a signal light located at the entranceto such garage and visible for a substantial distance along the streetupon which the entrance is located, a signal light located at a distancefrom said entrances and visible from locations at which at least some ofthe individual garage signals cannot be observed, a unitary controldevice at each garage, electrical connections from said control deviceto the signal light at the garage, electrical connections from thecontrol device in each garage to the distant signal, a central stationindicator, electrical connections from each control device to saidcentral station indicator, each of said control devices and theelectrical connections therefrom being constructed and arranged in suchmanner that manipulation of the control device at any garage willsimultaneously change the condition of the electrical connections toeach of the following, to the signal light at the entrance-to the garagewhere the particular control device is located, to the distant signallight, and to the central station indicator whereby, when the control atany garage device is actuated to change the indication at such garage asto the availability 01' parking space therein, the condition of theelectrical connec tions from such garage to the distant signal will becorrespondingly changed, and the condition of the central stationindicator will be changed to indicate the presence or absence ofavailable parking space in said garage,

3. A signal system for use with a multiplicity of individual garageunits for directing cars to individual units and forindicating theavailability of parking space in said units, at least one of said unitsbeing of difierent capacity from others of said units, said systemincluding a central control station for summarizing conditions at saidunits, each of said garage units having an entrance on a street, saidsystem including a signal located at the entrance to each garage unitand visible for a substantial distance on the street upon which theentrance is located, a control device at each garage for changing thecondition of said signal to indicate unavailability of parking space ineach unit, a central station indicator at the central control station,electrical connections from the control device in each garage unit tothe visible signal at the entrance to such unit, electrical connectionsfrom each control device to said central station indicator, each saidcontrol device and the electrical connections therefrom beingconstructed and arranged in such manner that manipulation of the controldevice at any garage will simultaneously change the condition of thesignal at such garage and the condition of the central stationindicator, said central station indicator having indicating meansoperable by said control devices to give a changed indicationproportional to the rated capacity of garage units at which said controldevices are manipulated.

4. A signal system as claimed in claim 3 in which said central stationindicator includes a plurality of resistance elements, one of which isassociated with the electrical connections from each of said controldevices, the value of each oi. said resistance elements beingproportioned to the capacity of the garage unit at which thecorresponding control device is located, said central station indicatoralso having an indicating instrumentality, the indication oi. which isresponsive to the combined value of all the unit resistances activatedat any particular instant.

5. A signal system for use with a group of garages for directing cars tosaid garages and indicating the availability of parking space therein,each of said garages having an entrance on a street, said systemincluding a signal located at the entrance to each garage and visiblefor a substantial distance along the street upon which the entrance islocated, a signal located at a distance from said-entrances, and visiblefrom 10- cations from which at least some of the individual garagesignals cannot be observed, electrical connections from each garage tothe signal associated with the entrance to such garage and to thedistant signal, and control means at each garage for changing thecondition of the signal at such garage in accordance with theavailability of parking space in such garage, the electrical connectionsfrom the control means at each garage to the distant signal beinginterconnected so that the distant signal may be set from any garage toindicate the availability of parking space somewhere in the group ofgarages and may be set to indicate absence of available parking space inthe group from the control means of the garage last to be filled.

ing' an entrance locatedupon the street 01 a city block for indicatingparking accommodations therein, comprising a first signal located at isaid entrance and visible at a substantial distance longitudinalLv ofthe street and acting to indicate the position of said entrance, asecond signal located at the corner of said street and visible at asubstantial distance longitudinally along an intersecting street, atleast one or said signals being provided with means indicating thedirection of the turn to be followed in approaching the garage, andcontrol means at'the garage for changing the condition of both of saidsignals to enable them to indicate the presence or absence of availableparking space in the garage.

WILLARD C. BRINTON.

REFERENCES CITED The following references are of record in the tile 0!this patent:

UNITED STATES PATENTS Number Name Date 1,044,151 Drost Nov. 12, 19121,195,754 Weber Aug. 22, 1916 1,459,628 Hockaday June 19, 1923 1,657,191Barrett Jan. 24, 1928 1,689,227 Burrell Oct. 30, 1928 1,711,534 King May7, 1929 2,008,909 Hershey July 23, 1935 2,017,168 Richardson Oct. 15,1935 FOREIGN PATENTS Number Country Date 524,618 Great Britain Aug. 9,1940

